RAL 6011B Resedagrün vs Commando Green

How close are they?

ΔE 6.8, close: similar, with a visible difference side by side. Commando Green is a little lighter than RAL 6011B Resedagrün.

Can I use Commando Green instead of RAL 6011B Resedagrün?

Usually, if you are not matching paint already on the model. Close match (ΔE 7). Commando Green is a little lighter than RAL 6011B Resedagrün.

Can I use RAL 6011B Resedagrün instead of Commando Green?

The same difference applies the other way round: RAL 6011B Resedagrün is a little darker.

ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.